Pyenson, L. 1938 The problems of applied entomology in Pernambuco, Brazil. Part II. A survey of some of the pests of the crops of Pernambuco.. Revista de Entomologia. Rio de Janeiro 9: 16-31.

Notes: Species mentioned includes Pseudococcus sp., Hemichionaspis minor, Saissetia sp., Lepidosaphes beckii, Chrysomphalus sp., Chionaspis citri, Icerya purchasi, Orthezia sp.